Server-side enforcement of SVN properties

[Leonid Zeitlin]

Hello all,
I have a Subversion server and a bunch of Windows clients accessing it 
with TortoiseSVN via http protocol (Apache mod_dav_svn). I want a 
certain Subversion property (namely, svn:needs-lock) to be set on all 
new files with certain extension. I know this can be done with 
auto-props settings in SVN clients. But is there a way to enforce this 
centrally, on the server, so that these properties are set regardless of 
client configuration?

Thanks a lot,
  Leonid